import java.util.Scanner;

public class text_4 {
    public static void main(String[] args) {
        System.out.println("输入一个数");
        Scanner sc=new Scanner(System.in);
        int a=sc.nextInt();
        if (a%7==0){
            System.out.println("是7的倍数");
        }else {
            System.out.println("不是7的倍数");
        }
    }
}
